Crusher - Wikipedia

A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . Other metallurgical developments such as silver and gold mining mirrored the practices . At the time, mines and foundries were virtually all small enterprises except for the tin . A portable rock crusher from the early 20th century.

Crusher - Wikipedia

A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . Other metallurgical developments such as silver and gold mining mirrored the practices . At the time, mines and foundries were virtually all small enterprises except for the tin . A portable rock crusher from the early 20th century.